WEATHER · CLIMATE NORMALS · 1991–2020
Athens Climate — Averages by Month
What the weather in Athens, GRaverages across a standard 30-year period. Each month's figure is the 1991–2020 mean temperature and total rainfall from the ERA5 reanalysis — the long-run normal a place settles around, not a forecast for any particular day.
Month-by-month normals
| Month | Avg temperature | Avg rainfall |
|---|---|---|
| January | 8.8 °C · coldest | 55.1 mm |
| February | 9.6 °C | 50.3 mm |
| March | 11.9 °C | 52.0 mm |
| April | 15.4 °C | 30.8 mm |
| May | 20.5 °C | 24.7 mm |
| June | 25.4 °C | 12.3 mm |
| July | 27.8 °C · warmest | 7.1 mm |
| August | 27.5 °C | 5.1 mm |
| September | 23.4 °C | 16.5 mm |
| October | 18.9 °C | 28.6 mm |
| November | 14.2 °C | 47.8 mm |
| December | 10.3 °C | 62.1 mm · wettest |
How to read these numbers
These are reanalysis normals, not readings from a single weather station. They come from the ERA5 0.25° (~25 km) global reanalysis grid, sampled at the grid cell nearest Athens — centred at 38.00°N, 23.75°E. A reanalysis blends observations with a physics model onto an even grid, so a coastal or mountain city's cell can read a little cooler, warmer, wetter or drier than the city centre itself. The month-to-month shape — when it's hot, when it rains — is what these normals capture best.
“Normal” means the 1991–2020 average, the current World Meteorological Organization standard period. A normal is what a place tends toward over decades — any single day, month or year can and will depart from it.